With suspend-then-hibernate working in general in the system - clicking power button that is configured as sleep - suspend then hibernate works as intended.
However - if pressing Sleep button from menu - system enters regular sleep
can you please click on the desktop and type “info”
then open the settings page and copy to clipboard the details there
paste them into the text window here preceeded with a single line containing 3 backticks so it shows in text box
like this